Note 15 - Fair Value Measurements (Details Textual)	Jan. 08, 2016
Diffusion LLC [Member]
Business Combination, Period Following Merger in Which Receipt of Cash for Discontinued Product Assets Would Trigger Contingent Value Right Payements	5 years

The period following a merger that, if the reporting entity receives net cash payments for the sale of any of the assets related to a discontinued product line, would trigger a required payment to holders of contingent value rights.

No definition available.

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Namespace Prefix:	dffn_
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Balance Type:	na
Period Type:	duration